S4G: Spitzer Survey of Stellar Structure in Galaxies Catalog

The Spitzer Survey of Stellar Structure in Galaxies (S4G) catalog contains photometry and model parameters for over 2300 nearby galaxies observed at 3.6 and 4.5 microns. This extremely deep survey from NASA reaches a 1 sigma surface brightness limit of μ3.6(AB) = 27 mag arcsec-2. The catalog provides derived parameters and links to data access pages for each galaxy.

Use Cases

• Modeling galaxy morphology and structure based on infrared photometry.
• Analyzing stellar surface density distributions using the deep surface brightness limit.
• Correlating infrared-derived parameters with previously published galaxy properties.
• Studying nearby galaxy populations within the volume-, magnitude-, and size-limited survey scope.

Strengths

• Over 2300 galaxies provide a substantial sample for statistical analysis.
• Extremely deep survey reaching a 1 sigma surface brightness limit of μ3.6(AB) = 27 mag arcsec-2.
• Data includes photometry and model parameters derived from IRAC images.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Observational data from the Spitzer Space Telescope's IRAC instrument.

Time Range

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Freshness

Last updated 2026-03-13 17:41:53.008060; freshness should be verified.

Geography

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